Semiconductor integrated circuit having encrypter/decrypter function for protecting input/output data transmitted on internal bus
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United States of America Patent
Stats
-
Aug 21, 2012
Grant Date -
Mar 13, 2003
app pub date -
Apr 23, 2002
filing date -
Aug 30, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A semiconductor integrated circuit is provided, which includes: a first circuit; a second circuit; a data BUS; and first and second encryption/decryption circuits for encrypting/decrypting data transmitted between the first and second circuits on the data bus. The first encryption/decryption circuit is for encrypting data output from the first circuit, outputting the encrypted data to the data BUS, decrypting an encrypted data received from the second encryption/decryption circuit, and providing the decrypted data to the first circuit. The second encryption/decryption circuit is for decrypting the encrypted data received from the first encryption/decryption circuit, providing the decrypted data to the second circuit, encrypting data output from the second circuit, and outputting the encrypted data to the data BUS.
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